<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>选择器</title>
    <link rel="stylesheet" href="../css/03-选择器.css">
</head>
<body>
<div id="bigBox">
    <div id="ziBox" class="c1">我是div1</div>
    <div>我是div222222222
        <div class="c1">我是子div1</div>
        <div class="c1">我是子div2</div>
    </div>
    <span class="s3">我是div中的span
    </span>
    <div class="c2">我是div3</div>
</div>
<div class="c3">我是div4</div>
<span class="s1">我是span1</span>
<span class="s2">我是span2</span>
<span class="s2">我是span3</span>

<div class="tag">
    <h1>我是一个h1标签</h1>
    <span>我是一个span标签1</span>
    <div>
        <p>我是一个p标签</p>
        <span>我是一个span标签2</span>
        <strong>我是一个强调标签</strong>
    </div>
    <p>我是一个p标签</p>
</div>

<a href="#" target="_blank">我是一个a标签</a>
</body>
</html>